Matt Smith AllThingsSmitty

Getting Started with NPM (as a developer)

As easy as 1, 2, 3!

Updated:

Aug, 08, 2022 update config docs for npm 8+
Jul 27, 2021 add private scopes
Jul 22, 2021 add dist tags
Jun 20, 2021 update for --access=public
Sep 07, 2020 update docs for npm version

Make it useful

Install Package Control. For SublimeText 2, paste the following in Terminal:

import urllib2,os; pf='Package Control.sublime-package'; ipp = sublime.installed_packages_path(); os.makedirs( ipp ) if not os.path.exists(ipp) else None; urllib2.install_opener( urllib2.build_opener( urllib2.ProxyHandler( ))); open( os.path.join( ipp, pf), 'wb' ).write( urllib2.urlopen( 'http://sublime.wbond.net/' +pf.replace( ' ','%20' )).read()); print( 'Please restart Sublime Text to finish installation')

From here on out, use Package Control to install everything. ⌘+Shift+P, then type Install to get a list of installable packages you can 'livesearch through. After installing plugins, they should be running.

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

Styling native elements

Native HTML controls are a challenge to style. You can style any element in the web platform that uses Shadow DOM with a pseudo element ::pseudo-element or the /deep/ path selector.

video::webkit-media-controls-timeline {
  background-color: lime;
}

video /deep/ input[type=range] {

Hello, visitors! If you want an updated version of this styleguide in repo form with tons of real-life examples… check out Trellisheets! https://github.com/trello/trellisheets

Trello CSS Guide

“I perfectly understand our CSS. I never have any issues with cascading rules. I never have to use !important or inline styles. Even though somebody else wrote this bit of CSS, I know exactly how it works and how to extend it. Fixes are easy! I have a hard time breaking our CSS. I know exactly where to put new CSS. We use all of our CSS and it’s pretty small overall. When I delete a template, I know the exact corresponding CSS file and I can delete it all at once. Nothing gets left behind.”

You often hear updog saying stuff like this. Who’s updog? Not much, who is up with you?

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

	for (var i=1; i <= 20; i++)
	{
	if (i % 15 == 0)
	console.log("FizzBuzz");
	else if (i % 3 == 0)
	console.log("Fizz");
	else if (i % 5 == 0)
	console.log("Buzz");
	else
	console.log(i);

	@media only screen and (min-width: 320px) {

	/* Small screen, non-retina */

	}

	@media
	only screen and (-webkit-min-device-pixel-ratio: 2) and (min-width: 320px),
	only screen and ( min--moz-device-pixel-ratio: 2) and (min-width: 320px),
	only screen and ( -o-min-device-pixel-ratio: 2/1) and (min-width: 320px),

	{
	"name": "my-app",
	"version": "1.0.0",
	"description": "My test app",
	"main": "src/js/index.js",
	"scripts": {
	"jshint:dist": "jshint src/js/*.js",
	"jshint": "npm run jshint:dist",
	"jscs": "jscs src/*.js",
	"browserify": "browserify -s Validating -o ./dist/js/build.js ./lib/index.js",

	function foo(x) { x = (typeof x != "undefined") ? x : 10; .. }
	function foo(x = 10) { .. }

	function foo(x,y,z) { .. }; foo.apply(null,[1,2,3]);
	function foo(x,y,z) { .. }; foo(...[1,2,3]);

	function foo() { var args = [].slice.call(arguments); .. }
	function foo(...args) { .. }

	var o = { x: 2, y: 3 }, x = o.x, y = o.y, z = (typeof o.z != "undefined") ? o.z : 10;